• The Pechmann condensation is a synthesis of coumarins, starting from a phenol and a carboxylic acid or ester containing a β-carbonyl group. The condensation...
    5 KB (434 words) - 15:35, 4 February 2024
  • Thumbnail for Hans von Pechmann
    Pechmann (1 April 1850 – 19 April 1902) was a German chemist, renowned for his discovery of diazomethane in 1894. Pechmann condensation and Pechmann pyrazole...
    5 KB (407 words) - 12:24, 23 August 2024
  • Pechmann is a surname of German origin. Notable persons with that name include: Joseph A. Pechman (1918–1989), American economist Hans von Pechmann (1850–1902)...
    382 bytes (82 words) - 23:01, 31 March 2021
  • Knorr in 1883. In a classical method developed by German chemist Hans von Pechmann in 1898, pyrazole was synthesized from acetylene and diazomethane. Pyrazoles...
    13 KB (1,104 words) - 06:57, 28 October 2024
  • Thumbnail for Matthias Pechmann
    Matthias Pechmann is a retired German swimmer who won two medals in the individual medley events at the 1970 European Aquatics Championships. Between 1968...
    2 KB (83 words) - 14:15, 6 August 2024
  • Thumbnail for Polyethylene
    combustible. Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane....
    57 KB (6,215 words) - 15:24, 5 November 2024
  • Cornelia (Connie) Pechmann is an American academic and marketing research scholar. She is a Professor of Marketing at University of California, Irvine...
    14 KB (1,413 words) - 17:18, 7 October 2024
  • Thumbnail for Mandelic acid
    "Mandelic Acid". Organic Syntheses; Collected Volumes, vol. 3, p. 538. Pechmann, H. von (1887). "Zur Spaltung der Isonitrosoverbindungen". Berichte der...
    10 KB (935 words) - 09:35, 3 October 2024
  • Alice von Pechmann (1882–1976) was a German interior designer specializing mostly in porcelain. Her work was produced by Meissen Porcelain Factory and...
    4 KB (455 words) - 23:58, 17 January 2024
  • Thumbnail for Diazomethane
    compound with the formula CH2N2, discovered by German chemist Hans von Pechmann in 1894. It is the simplest diazo compound. In the pure form at room temperature...
    18 KB (1,648 words) - 07:02, 27 July 2024